It is possible to grow a small amount of money into a significant sum. But it's important to choose wisely and maintain adequate diversification. You can never know with 100% certainty what stocks are going to meet your expectations, but if you put together a portfolio of growth stocks, you increase the odds that one of your stocks will deliver life-changing returns.That said, here are two growing companies that have the potential to multiply an original investment over the long term.1. C3.aiGrowing demand ...